Richard pattison



(ModeL) 2 Sheets-Sheet l.

R. PATTI'SON. STEAM INJECTOR.

No. 599,473. Patented Feb. .22, 1898.

2 Sheets Sheet 2.

(M d l.)

0 e R. PATT'ISON.

STEAM INJECTOR No. 599,473. Paten ted FebQZZ, 1898;

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SPECIFICATION forming part of Letters Patent No. 599,473, dated February 22, 1898. Application filed January 19, 1897. Serial No. 619,714. (Model) To aZZ whom it may concern.-

Be it known that I, RICHARD PATTISON, of New York, in the county and State of New York, have invented a new and useful Im provement in Steam-Injectors, of which the following is a specification.

This invention relates to an improvement in steam-injectors, and more particularly to that class known as double-jet or lifting and forcing injectors.

One object of this invention is to provid an injector of the above class in which the admission of steam to both the lifting and forcing chambers is controlled by a single valve, thereby doing away with the necessity of providing the steam-inlet pipe with a valve.

Another object is to provide an injector in which the pressure is very low in the overflow-port of the forcing-chamber relative to the pressure in the boiler and in which water at a very high temperature may be successfully lifted into the injector and forced therefrom into the boiler.

A further object is to provide means for preventing the setting of the valve in its seat.

A still further object is to provide means for insuring a thoroughly steam-tight valve.

A practical embodiment of my invention is represented in the accompanying drawings, in which- Figure 1 represents an outside view of the injector, the valve-operating handle being shown in full lines in the position which it assumes when the admission of steam to the injector is entirely out off and in dotted lines in the two positions which it assumes, first, when the steam is admitted to the forcingchamber only by way of the lifting-chamber, communication being established from the forcing-chamber to the overflow-chamber, and, second, in the position which it assumes when the valve has shut off communication to the overflow-chamber and opened communication directly to the forcing-chamber and also to the lifting-cha1nbe1n Fig. 2 is an outside view of the reverse side of the injector from that shown in Fig. 1. Fig. 3 is a vertical longitudinal central section through the injector, the valve or cook being shown in its closed position. Fig. 4- is a detailed view showing the position of the cock when steam by A, and it is provided with a steam-inlet a,

a water-inlet a, and a discharge opening or outlet a for attachment thereto of a pipe or tube leading to the boiler.

The steam-chamber is denoted by B, the lifting-chamber by G, the forcing-chamber by D, and the overflow-chamber by E. The in jector-casing is further provided with a suitable valve-seat f, to which is fitted a rotary valve or cook F, having a suitable stem 1" uprising therefrom, to which is attached a suitable operating-handle f for turning the said valve or cook.

The steam-inlet a is provided with a suitable port a communicating with the valveseat f. The steam-chamber B is provided with a suitable port I), communicating with the valve-seat f a short distance from the port (0 The overflow-chamber is provided with a port 6, communicating with the valveseat f, and adjacent to the said port 6 is located a suitable port cl, opening from the valve-seat f into the forcing chamber D. Another port cl opens from the valve-seat f into the forcing-chamber D through the forcenozzle, to be hereinafter described.

The lifting-chamber G communicates with the forcing-chamber D through a lifting-tube G, and the steam-chamber B connects with the lifting-chamber 0 through a steam-nozzle g, which nozzle 9 is located in position to direct the steam into the lifting-tube G for lifting the water into the forcing-chamber D. A forcing-tube H is located in the forcing-chamber D, and a steam-nozzle h is located in position to direct the steam which enters the port cl when the valve F is full open into the forcing-tube H for forcing the water within the forcing-chamber D into the boiler.

The valve F is provided with a suitable through-port f which port is considerably larger at one side of the valve and is gradually reduced through to the other side of the flange L when the parts are in position.

valve. The valve F is further provided with a suitable port f which is adapted to open communication between the forcing-chamber D and the overflow-chamber E, through the ports 01 and 6, when the valve is in a position part way between full closed and full open, the said position being shown clearly in Fig. 4

The valve F is inserted into its seat f through the casing A, and is held against its seat and at the same time rendered steam-tight by the following device: A yielding packing I is inserted into position surrounding the valvestem f, between two plates J and K. A circumferential flange L extends outwardly from the casing A, which flange is screw-threaded upon its exterior and has a smooth bore. The plates J and K are slightly smaller than the bore of the flange L and the packing I is adapted to fitthe said bore quite snugly. The plate K is of sufficient thickness to project a slight distance outside the outer end of the A clamping-nut M surrounds the valve-stem f and has a screw-threaded engagement with the exterior of the flange L. The top of the nut M engages the plate K as the nut is screwed inwardly, and the further inward movement of the nut M serves to yieldingly force the valve F down into its seat f and at the same time compress the yielding packing I and thereby force it snugly against the bore of the flange L.

To prevent the valve F from sticking under the pressure of steam, I provide a chamber N beneath the valve and admit steam thereto through a suitable duct f leading from the through-port or passage-way f. The steam within the chamber N will tend to lift the valve away from its seat f and thereby allow it to be freely turned. The chamber N is shown in the present instance as formed in a screw-cap O, which has a screw-threaded engagement with a circumferential flange P of the casing A.

The casing A is provided with another circumferential flange Q, with which a cap R has a screw-threaded engagement. Access to the steam-nozzle g and lifting-tube G is gained by removing the cap R. The casing A is still further provided with a pair of stops a a for limiting the movements of the valveoperating handle.

The operation of my invention is as follows: Supposing that the valve be closed, as shown in Figs. 1 and 3, and it is desired to, force water into the boiler, the valve-operating handle f is swung around until the valve is in the position shown in Fig. 4, in which the port f has open communication between the foreing-chamber D and the overflow-chamber E, and the port f has open communication between the steam-inlet a and the steam chamber B. The steam thus admitted into the steam-chamber B will pass, through the nozzle g into the lifting-tube G and thereby lift the water into the chamber 0, from thenceinto the forcing-chamber D and from thence into the overflow-chamber E. As soon as the water is seen to escape from the overflow E the movement of the valve-operating handle is continued until stopped by the stop a when the valve will be in the position shown in Fig. 5, in which the communication between the forcing-chamber D and the overflow E is cut off and direct communication established through the passage-way f and port cl into the forcing-chamber D, communication at the same time being still obtained from the inlet a into the steam-chamber B. In this position the valve is full open and steam is being admitted through the nozzle g into the lifting-tube G, serving to lift the water into the chamber D and also through the nozzle h into the forcing-tube H for forcing the water within the chamber D out through the discharge end of the injector to the boiler.

It will be seen from the above description that the admission of steam is thoroughly controlled by the single valve, the handle of the valve at the same time being caused to pass through an arc of only about ninety degrees between its extreme limits of movement. It will further be seen that the injector as above described consists of a very few parts and also that the parts are so arranged that the liability of the steam wearing them to a considerable degree is reduced to a minimum. ;The steam nozzles and tubes are so arranged fthat they may be readily removed from the injector, and the wear upon the valve may be i very quickly and easily taken up when so desired.

The arrangement of the several chambers iand parts is such that the pressure is very flow at the forcing-chamber D when the in- ?jector is working, and also the injector is capable by reason of the arrangement of the lifting and forcing tubes to feed very hot water to the boiler when so desired. It is evident that slight changes may be rei'sorted to in the construction and arrangelment of the several parts without departing from the spirit and scope of my invention. fHence I do not .wish to limit myself strictly jto the structure herein set forth; but i; What I claim is 1. In an injector, a casing having a rotary valve seated therein in the rear of the forcer, 1 the said casing being provided with a steaminlet, a lifting-chamber, an overflow-chamber and a forcing-chamber, all in direct comlmunication with the face of the valve, the said valve being provided with two ports, one for opening and closing communication be- :tween the steam-inlet and the lifting-chamber, and between the steam-inlet and forcing chamber, and the other port for opening and closing communication between the forcing- 5 chamber and the overflow-chamber, substan- Qtially as set forth. 2. In an injector a casing having a rotary l valve seated therein in the rear of the forcer, E the said casing being provided with a steam inlet, a steam-chamber, an overflow-chamber and a forcing-chamber all leading directly to the face of the valve, and a lifting-chamber communicating with the steam-chamber and forcing-chamber; the said valve being provided with a port adapted to open comm unication between the steam-inlet and the steamchamber and between the steam-inlet and the forcing-chamber, and with a second port for opening and closing communication between the forcing-chamber and the overflow-chamber, substantially as set forth.

3. In an injector the combination with a casing having a valve-seat therein, and a steam-chamber located below the valve-seat, of a rotary valve arranged to turn in said seat the said valve having a steam port or passage-Way therein and a duct leading from said steam-port to the steam-chamber whereby the pressure of steam will tend to lift the valve and means for positively forcing the valve downwardly, substantially as set forth.

4. In an injector the combination with a casing provided with a steam-inlet, a liftingchamber, an overflow-chamber and a forcing- 25 chamber having an overflow-port and a steaminlet port, of a Valve seated Within the casing in the rear of the forcer havinga port adapted to open direct communication between the steam-inlet and the lifting-chamber, between 0 RICHARD PATTISON.

Witnesses:

FREDK. HAYNES, ROBERT E. SEWARD. 

